Dependence on laser intensity and pulse duration in proton acceleration by irradiation of ultrashort laser pulses on a Cu foil target

2005 ◽  
Vol 12 (7) ◽  
pp. 073102 ◽  
Author(s):  
Y. Oishi ◽  
T. Nayuki ◽  
T. Fujii ◽  
Y. Takizawa ◽  
X. Wang ◽  
...  
Keyword(s):  
Pulse Duration ◽  
Laser Intensity ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Proton Acceleration ◽  
Foil Target ◽  
Cu Foil ◽  
Ultrashort Laser

scholarly journals Influence of pulse duration on the amorphization of GeSb thin films under ultrashort laser pulses

2004 ◽  
Vol 84 (22) ◽  
pp. 4445-4447 ◽  
Author(s):  
S. M. Wiggins ◽  
J. Solis ◽  
C. N. Afonso
Keyword(s):  
Thin Films ◽  
Pulse Duration ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Ultrashort Laser

scholarly journals High quality GeV proton beams from a density-modulated foil target

2009 ◽  
Vol 27 (4) ◽  
pp. 611-617 ◽  
Author(s):  
T.P. Yu ◽  
M. Chen ◽  
A. Pukhov
Keyword(s):  
Laser Intensity ◽  
Laser Pulses ◽  
Two Dimensional ◽  
High Quality ◽  
Proton Acceleration ◽  
Circularly Polarized ◽  
Particle In Cell ◽  
Efficient Energy ◽  
Peak Energy ◽  
Foil Target

AbstractWe study proton acceleration from a foil target with a transversely varying density using multi-dimensional Particle-in-Cell (PIC) simulations. In order to reduce electron heating and deformation of the target, circularly polarized Gaussian laser pulses at intensities on the order of 1022 Wcm−2 are used. It is shown that when the target density distribution fits that of the laser intensity profile, protons accelerated from the center part of the target have quasi-monoenergetic spectra and are well collimated. In our two-dimensional PIC simulations, the final peak energy can be up to 1.4 GeV with the full-width of half maximum divergence cone of less than 4°. We observe highly efficient energy conversion from the laser to the protons in the simulations.

scholarly journals Classical effect for enhanced high harmonic yield in ultrashort laser pulses with a moderate laser intensity

2017 ◽  
Vol 50 (6) ◽  
pp. 065004 ◽  
Author(s):  
Y Z Shi ◽  
S Wang ◽  
F L Dong ◽  
Y P Li ◽  
Y J Chen
Keyword(s):  
Laser Intensity ◽  
High Harmonic ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Classical Effect ◽  
Ultrashort Laser

scholarly journals Optimization of laser parameters for proton acceleration using double laser pulses in TNSA mechanism

2020 ◽  
Vol 38 (2) ◽  
pp. 73-78
Author(s):  
Saurabh Kumar ◽  
Devki Nandan Gupta
Keyword(s):  
Laser Pulse ◽  
Pulse Duration ◽  
Laser Intensity ◽  
Laser Pulses ◽  
Maximum Energy ◽  
Rear Side ◽  
Proton Acceleration ◽  
Pulse Delay ◽  
Laser Parameters ◽  
Accelerated Protons

AbstractThe energy of protons accelerated by ultra-intense lasers in the target normal sheath acceleration (TNSA) mechanism can be greatly enhanced by the laser parameter optimization. We propose to investigate the optimization of laser parameters for proton acceleration using double laser pulses in TNSA mechanism. The sheath field generation at the rear side of the target is significantly affected by the introduction of second laser pulse in TNSA mechanism, and consequently, the energy of the accelerated protons is also modified. The second laser pulse was introduced with different delays to study its impact on proton acceleration. Our study shows that the interplay of laser intensity and pulse duration of both laser pulses affects the proton acceleration. It was found that the proton maximum energy is the function of both laser intensity and pulse duration. A number of simulations have been performed to obtain maximum proton energy data under different combinations of laser intensity and pulse duration for the two laser pulses. The simulation results account for the underline physics for the proton bunch energy and the sheath field as a function of pulse intensity and pulse delay.

Role of target material in proton acceleration from thin foils irradiated by ultrashort laser pulses

2014 ◽  
Vol 90 (2) ◽  
Author(s):  
M. Tayyab ◽  
S. Bagchi ◽  
B. Ramakrishna ◽  
T. Mandal ◽  
A. Upadhyay ◽  
...  
Keyword(s):  
Target Material ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Proton Acceleration ◽  
Thin Foils ◽  
Ultrashort Laser

Ultrafast spectroscopy of C-H vibrations in pathogenic bacteria in 3-μm spectral range

2021 ◽  
Vol 19 (1) ◽  
pp. 015602
Author(s):  
S Shelygina ◽  
V Kompanets ◽  
E Tolordava ◽  
S Gonchukov ◽  
S Chekalin ◽  
...  
Keyword(s):  
Pathogenic Bacteria ◽  
Laser Intensity ◽  
Vibrational Excitation ◽  
Protein Structures ◽  
Laser Pulses ◽  
Spectral Shift ◽  
Ultrashort Laser Pulses ◽  
Mid Infrared ◽  
Bacterial Cultures ◽  
Ultrashort Laser

Abstract Dynamic optical density spectra were obtained under multipulse excitation of bacterial cultures of S. aureus and P. aeruginosa by 3 μm mid-infrared ultrashort laser pulses, corresponding to the vibrational excitation of the C–H bonds of the bacterial cell. These spectra demonstrated pronounced laser intensity-dependent blue spectral shift, presumably associated with the breaking of hydrogen bonds, which are responsible for the formation of secondary and tertiary protein structures.

Kinetic energy distribution of photoelectrons in the tunnel ionization process in the case of ultrashort laser pulses

2016 ◽  
Vol 25 (03) ◽  
pp. 1650040 ◽  
Author(s):  
V. M. Petrović ◽  
T. B. Miladinović
Keyword(s):  
Energy Distribution ◽  
Pulse Duration ◽  
Theoretical Study ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Ionization Process ◽  
Beam Shape ◽  
Tunnel Ionization ◽  
Semiclassical Model ◽  
Ultrashort Laser

In this paper, we use semiclassical model to discusse the kinetic electron energy distribution in the single tunnel ionization process of an atom with respect on the pulse duration and the spatial–temporal laser beam distribution. Our theoretical study show that the pulse duration is an important parameter in the ionization process, as well as beam shape.

PPPS-2013: Laser-driven proton acceleration with two ultrashort laser pulses

2013 ◽  
Author(s):  
Jurgen Boker ◽  
Marco Swantusch ◽  
Toma Toncian ◽  
Mirela Cerchez ◽  
Monika Toncian ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Proton Acceleration ◽  
Ultrashort Laser

Welding characteristics of foturan glass using ultrashort laser pulses

2012 ◽  
Author(s):  
Isamu Miyamoto ◽  
Kristian Cvecek ◽  
Yasuhiro Okamoto ◽  
Michael Schmidt ◽  
Henry Helvajian
Keyword(s):  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Ultrashort Laser

Sapphire cutting and engraving with short and ultrashort laser pulses

2014 ◽  
Author(s):  
Anthony Kirsch ◽  
Nicolas Falletto ◽  
Rainer King
Keyword(s):  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Ultrashort Laser
Sign in / Sign up

Export Citation Format

Share Document